Active clinical trials for "Malaria"

The purpose of this study is to determine whether artemether + lumefantrine is as effective as chloroquine + sulfadoxine pyrimethamine in the treatment of uncomplicated Plasmodium falciparum malaria

The present study will address the question whether the use of IPT using SP in pregnancy is efficacious in Rwanda, where it is going to be used for the first time, in areas with high levels of SP resistance. While the implementation of the new policy will take place in areas at low SP resistance level, where we expect pregnant women and newborns to benefit from it, it is of paramount importance to clarify which is the real impact of IPT/SPin areas of high SP drug resistance and at what level of SP resistance this strategy is still efficacious. As bed nets are a part of the actual control strategy of malaria in pregnancy all women will receive a bed net at enrolment

In Peru, Mefloquine plus Artesunate (MAS3), is the current first line treatment for P. falciparum malaria in the Amazonian Region, and has proved its efficacy against multi-resistant P. falciparum parasites, but several side effects have been reported. Dihydroartemisinin-piperaquine (DHA-PPQ) is a new co-formulated and well tolerated ACT, increasingly used in Southeast Asia where it has proved to be highly effective against Plasmodium falciparum malaria. We tested the efficacy, safety and tolerability of DHA-PPQ in patients with uncomplicated P. falciparum malaria. A RCT to evaluate DHA-PPQ was carried out, between 2003 and 2005. Patients with uncomplicated P. falciparum malaria were randomly allocated to receive either DHA-PPQ or MAS3 with a 63-day follow-up period. Five hundred twenty two patients were included in the analysis, 262 were allocated to receive DHA-PPQ, and 260 to receive MAS3. The two groups were comparable at baseline in demographic and clinical characteristics. The mean time for parasite clearance into the DHA-PPQ group was 32.0 hours and 35.5 hours in the MAS3 group. Twenty-four hours after the first dose, the proportions of patients whose cleared parasitaemia were 67.2% in the DHA-PPQ group, and 58.1% in the MAS3 group (RR 1.25, [95% CI 1.03-1.52], p = 0.017). All patients were able to clear parasites within 72 hours after the first dose. The mean time for fever clearance was 28.0 and 29.5 hours in DHA-PPQ and MAS3 group respectively. (P= 0.69). Twenty-four hours after the first dose, 85.5% and 83.1% of patients cleared fever in the DHA-PPQ and MAS3 group respectively (p>0.05). The Adequate Clinical and Parasitological Response (ACPR), PCR adjusted, were 97.7% and 99,2% for the DHA-PPQ and MAS3 group respectively, (RR 0.99, 95% CI [0.86-1.13], P = 0.88). No Early Treatments Failures were reported in any group. In the DHA-PPQ group, according to the PCR adjusted results, 6 subjects had Late treatment Failures. In the MAS3 group, two Late Treatment Failures was reported. The frequency of adverse events was significantly lower in patients treated with DHA-PPQ than in those treated with MAS3. DHA-PPQ proved to be a highly effective antimalarial drug for the treatment of P. falciparum malaria and suitable for use in the Peruvian Amazon region. It also has the advantage of being better tolerated. In terms of cost, DHA-PPQ is cheaper and more affordable than MAS3 and should be considered for the National Antimalarial Drug Policy in Perú.

To compare Azithromycin plus Chloroquine versus Mefloquine to treat uncomplicated plasmodium falciparum malaria.

Treatment of uncomplicated P.falciparum malaria with sulfadoxine-pyrimethamine (SP) is followed by a marked increase in the density of gametocytes. To determine whether treatment with SP enhances gametocyte carriage, we randomized asymptomatic carriers of P.falciparum to receive SP alone, SP with a single dose of artesunate, or placebo, and followed them for 56 days to record gametocyte presence and density.

The purpose of this study is to determine the efficacy of sulfadoxine-pyrimethamine plus artesunate versus sulfadoxine-pyrimethamine alone in the treatment of uncomplicated malaria.

This study will examine the safety and immune response of healthy adult volunteers to AMA1-C1, an experimental malaria vaccine developed by the NIAID. Malaria affects about 300 million to 500 million people worldwide each year, causing from 2 million to 3 million deaths. Increasing drug resistance to the malaria parasite, as well as widespread resistance of mosquitoes (the insects that transmit the parasite) to pesticides are reducing the ability to control malaria through these strategies. A vaccine that could reduce illness and death from malaria would be a valuable new resource in the fight against this disease. Early tests of AMA1-C1 in 66 people in the United States and in Mali, West Africa, found no serious side effects of the vaccine. This study will test a shorter schedule of vaccinations with AMA1-C1 than that used in the previous studies. Healthy volunteers between 18 and 50 years of age who weigh at least 110 pounds and with no travel to malaria endemic areas in the past 12 months may be eligible for this study. Candidates are screened with a medical history and physical examination, blood and urine tests, and a urine pregnancy test for women who are able to bear children. Participants are randomly assigned to receive three injections of either the experimental malaria vaccine or a placebo (a solution that does not contain the vaccine) over a 2-month period. The shots are given in an upper arm muscle, each 1 month apart. On the day of each injection, participants give a history of symptoms since the last visit, have a brief physical examination and blood test and, for women, a blood or urine pregnancy test. After the injection, participants remain in the clinic 60 minutes for observation. In addition to the injections, participants undergo the following procedures: Record temperature and symptoms on a diary card daily for the first 7 days after each injection. Follow-up clinic visits 1, 3, 7 and 14 days after each shot to check for side effects. Blood samples are drawn before each injection and at each return clinic visit to check the safety and immune response to the vaccine. Have apheresis, a special procedure that separates certain components of the blood, 7 days after each injection to measure the function of germ-fighting blood cells. For this procedure, blood is drawn through a needle in an arm vein and directed into a machine that separates the different types of blood cells. The white cells are collected in a plastic ...

Plasmodium falciparum resistance to chloroquine (CQ) and sulfadoxine-pyrimethamine (SP) continue to spread, impeding control of this important disease. CQ and SP are still the most commonly used antimalarial drugs for malaria prevention during pregnancy and might be made less effective by resistance. However, the treatment and prophylaxis regimens used may also create conditions for selecting resistant malaria parasite strains. A better understanding of the relationships between chemoprophylaxis regimens and resistance would be helpful to improve chemoprophylaxis of malaria in pregnancy. This work aims to improve the use of chemoprophylaxis in pregnancy by determining whether there is a relationship between the use of standard prophylactic regimens with CQ and SP and the occurrence of P. falciparum resistant strains in pregnant women. The study consists of 2 parts. The first part is a randomized trial comparing 3 chemoprophylactic treatment groups: - weekly CQ after initial presumptive CQ treatment, - CQ intermittent presumptive treatment given as a standard dose at 2nd and 3rd trimester, respectively and SP intermittent presumptive treatment given as a single dose at 2nd and 3rd trimester, respectively. These treatment groups will also be compared to a group of women delivering at the same health centre but who have not been participating in the study. The second part will be a clinical trial for assessment of clinical and parasitological efficacy of CQ and SP treatment in pregnant women presenting with uncomplicated malaria attacks. The study will be conducted from October 2002 to March 2005 in a health centre of Ouagadougou, Burkina Faso where malaria transmission is seasonal and resistance to CQ and SP is low.

Acute falciparum malaria is associated with low plasma arginine and impaired nitric oxide (NO) production. Both are associated with poor outcome. This study will examine the safety and effect of escalating doses of arginine in falciparum malaria. It will determine whether arginine can increase NO production and have an effect on NO-dependent physiological measurements. The hypothesis is that arginine: will be safe in falciparum malaria; will return plasma arginine concentration to normal/supranormal levels; will increase systemic and exhaled NO; reduces oxidant stress; and improves a number of NO-dependent physiological measures of relevance to malaria.

The purpose of this study is to determine whether folic acid, which is often routinely given to pregnant women to prevent birth defects and anemia, affects the efficacy of sulfadoxine-pyrimethamine, another drug that is routinely given to pregnant women in highly malarious areas, for prevention of the adverse effects of malaria during pregnancy.